seventh chord

基本解释

Diatonic seventh chords use the notes of the diatonic scale to add a seventh above the root to triads.
自然七和弦使用自然音阶的音，在三和弦上增加根音之上的七音。
His best known, the headache-inducing/soothing Great Gig in the Sky, contains jazzy seventh chords, but is really just a series of beautiful chord progressions, and not jazz in any meaningful way.
他最出名的，既引起头痛又抚慰人心的Great Gig in the Sky，含有爵士的七和弦，但是只是一系列美丽的和弦进行，无乱如何也算不上爵士乐。
While at the period of formation and gradual maturity of harmony thinking, the development of discord factors in harmony are showed by many dissonant chords such as the second and seventh and so on.
而在和声思维的形成与逐步成熟时期，和声中不协和因素的发展就通过增四度与减五度，二度与七度的引进体现出来等等。

a chord consisting of a triad with a seventh added above the root &rarrseedominant seventh chord ,diminished seventh chord , major seventh chord , minor seventh chord